January 2014
Intermediate to advanced
352 pages
6h 34m
Japanese
Content preview from JavaScriptで学ぶ関数型プログラミング
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315
付録
C
本書に登場する
Underscore
の関数
本書で登場する
Underscore
の関数の説明です
†
。アルファベット順に整理されて
います。パラメータ名が
[ ]
に囲まれている場合は省略可能であることを表し、
*
が
ついている場合は複数連続で取れることを表しています。
Underscore
のほとんどの
関数の
1
つ目のパラメータにコレクション（オブジェクト型もしくは配列）を受け
取ります。このパラメータは
list
もしくは
array
、
object
と表記されますが、
list
は
オブジェクト型と配列の両方を受け取ることができ、
array
と
object
はそれぞれの型
のみ受け取ることができます。
_.all(list, [iterator], [context])
_.every
のエイリアス。
list
のすべての値が
iterator
関数の真偽テストで
true
を返した場合に
true
を返す。
iterator
が渡されない場合は要素の値自体で真偽
を判定する。（
JavaScript
は
false
、
undefined
、
null
、
NaN
、
0
、
-0
、
''
の場合に
false
と判定し、その他はすべて
true
と判定する。）
_.any(list, [iterator], [context])
_.some
のエイリアス。
list
のいずれかの値が
iterator
関数の真偽テストで
true
を返した場合に
true
を返す。
iterator
が渡されない場合は要素の値自体で真偽
を判定する（
JavaScript
は
false
、
undefined ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.